A dummy Stuart tank being carried, April 1942; Up to thirty collapsible dummy tanks such as this could be carried in one truck. Julian Trevelyan, a camouflage officer, describes seeing an entire dummy railhead: 'No living man is there, but dummy men are grubbing in dummy swill-troughs, and dummy lorries are unloading dummy tanks, while a dummy engine puffs dummy smoke into the eyes of the enemy.'